Abstract
High crystallinity, nano size, and full contact with conductive media are essential for improving the performance of battery materials. Herein, α-MnO2/super-P composite is synthesized via in-situ hydrothermal method. As the cathode material of aqueous Zinc ion battery, the α-MnO2/super-P was maintained 47.0% of discharge capacity after 1000 cycles (decreased from 180 mAh g−1 in the first cycle to 84.6 mAh g−1 in the 1000th cycle) at a high rate of 1.0 A g−1 and reaches the coulombic efficiency to 100% throughout the whole cycles. The excellent electrochemical performance of α-MnO2/super-P is mainly due to the short diffusion path of Zn2+ and the large-scale conductive network of conductive carbon (super P) particles.
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